Question

Assertion (A): The spiracles of cockroach are holopneustic type.
Reason (R): All spiracles are functional.

• A. A and R are true. R is the correct explanation for A
• B. A and R are true. But R is not the correct explanation for A
• C. A is true. But R is false
• D. A is false. But R is true

Hint:

Holopneustic systems are advantageous for terrestrial life, especially in arid environments, by facilitating better control over water loss while maintaining necessary gas exchange.

Answer 1

The Correct Option is A

Holopneustic spiracles in cockroaches refer to the condition where all spiracles (breathing pores) are open and functional, allowing for efficient respiration. This is crucial for their survival in various environments, enhancing their ability to manage respiratory water loss and gas exchange effectively. The reason that all spiracles are functional supports this assertion because having all spiracles operational directly correlates with the holopneustic classification.